/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigHierarchy.h
Switches a multi parent element to a single parent. This sets the new parent's weight to 1.0 and disables weights for all other potential parents.
Returns true if changing the weight was successful
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=URigHierarchy) bool SwitchToParent ( [FRigElementKey](API\Plugins\ControlRig\Rigs\FRigElementKey) InChild, [FRigElementKey](API\Plugins\ControlRig\Rigs\FRigElementKey) InParent, bool bInitial, bool bAffectChildren )